module storage.attached {

  export class LocalStorageStorage implements AttachedStorage {

    constructor(

      private _uniqueKey: string,

      private _localStorage: typeof localStorage) {

    }

    getNames(callback: (error: Error, names: string[]) => void) {

      var names: string[] = [];

      for (var i = 0; i < this._localStorage.length; i++) {

        var key = this._localStorage.key(i);

        if (this._uniqueKey) {

          if (!startsWith(key, this._uniqueKey)) continue;

          key = key.slice(this._uniqueKey.length);

        }

        names.push(key);

      }

      callback(null, names);

    }

    populate(name: string, obj: any, callback: (error: Error) => void) {

      var prefix = (this._uniqueKey || '') + name;

      for (var k in obj) if (obj.hasOwnProperty(k)) {

        var key = prefix + k;

        obj[k] = this._localStorage.getItem(key);

      }

      callback(null);

    }

    update(name: string, obj: any, callback: (error: Error) => void) {

      var prefix = (this._uniqueKey || '') + name;

      for (var k in obj) if (obj.hasOwnProperty(k)) {

        var key = prefix + k;

        var value = obj[k];

        if (value === null)

          this._localStorage.removeItem(key);

        else

          this._localStorage.setItem(key, value);

      }

      callback(null);

    }

  }

  export module LocalStorageStorage {

    export function detect(uniqueKey: string, callback: (error: Error, storage: AttachedStorage) => void, windowOverride = window) {